"The mind, in discovering truth, acts in the same manner as it acts through the eye in discovering objects; when once any object has been seen, it is impossible to put the mind back to the same condition it was in before it saw it."

" [I]t is hardly to be believed that any man for the sake of some imaginary gratification to himself would wantonly injure the whole, if his mind were not first ulcerated with the impression of the injury that society by its ordinances is committing against him"

"Whereas a due exercise of the faculties of the mind strengthens and improves those faculties, whether of imagination or recollection; as the exercise of our limbs in dancing or fencing increases the strength and agility of the muscles thus employed."

"[T]he thing in which my imagination revelled the most freely, was the analysis of the private and internal operations of the mind, employing my metaphysical dissecting knife in tracing and laying bare the involutions of motive, and recording the gradually accumulating impulses."